TY - RPRT TI - Preliminary interpretations of geologic results obtained from boreholes UE25a-4,-5,-6, and -7, Yucca Mountain, Nevada Test Site AU - Richard W. Spengler AU - J. G. Rosenbaum PY - 1980 DO - 10.3133/ofr80929 UR - https://pubs.usgs.gov/publication/ofr80929 ID - ofr80929 ER -